nt - p h / 02 03 02 8 v 1 6 M ar 2 00 2 Can the states of the W - class be suitable for teleportation

nt - p h / 01 02 03 8 v 1 6 F eb 2 00 1 Quasiprobability and Probability Distributions for Spin 1 / 2 States ∗

We develop a Radon like transformation, in which P quasiprobability distribution for spin 1/2 states is written in terms of the tomographic probability distribution w.

ar X iv : q ua nt - p h / 02 03 04 6 v 1 1 1 M ar 2 00 2 Quantum imaging

We provide a brief overview of the newly born field of quantum imaging, and discuss some concepts that lie at the root of this field.

ar X iv : a st ro - p h / 02 04 03 6 v 1 2 A pr 2 00 2 Investigating the Flame Microstructure in Type

nt - p h / 03 02 02 8 v 1 4 F eb 2 00 3 Quantum Tomography

nt - p h / 02 03 01 1 v 1 4 M ar 2 00 2 On the Entanglement Properties of Two - Rebits Systems

Following the recent work of Caves, Fuchs, and Rungta [Found. of Phys. we discuss some entanglement properties of two-rebits systems. We pay particular attention to the relationship between entangle-ment and purity. In particular, we determine (i) the probability densities for finding pure and mixed states with a given amount of entanglement, and (ii) the mean entanglement of two-rebits states ...